[BBax]

The D Plane also has a reference to 2-N-0 Clubhead Line of Flight. "The Line of Flight of the Clubhead and the Line of Flight of the Ball are not the same but touch momentarily during Impact." "This line cuts diagonally across the face of the Inclined Plane and passes through both the Imapct Point and the Low Point. These points also locate parallel Plane Lines passing through them - that is, the Impact Plane Line and the Low Point Plane Line, each of which must use the "Sweet Spot" Plane (2-F). Later on in 2-N-0 Mr. Kelley explains how ball positionrelative to Low Point can affect the Angle of Approach. For too many years I would always pull my short irons and never knew why. Now that I better understand the effect of downward on outward (elements of D Plane) I now know why I need to aim further left with the shots that I hit down more one and more right on shots I hit from a ball position closer to low point. Also the "85%" is not the set standard of deviation. Loft and swing speed also play a role in this calculation. Remember, and I may not have this quote exact but Homer did say that, "only those who know how precise it can be know how precise it must be."